7553 get elapsed time refactoring

[ssonthal]

Resolves #7553

Changes

• Replacing the logic of stopwatch.start() and stopwatch.stop() with dotnet suggested optimized approach of using startTime and GetElapsedTime method combination.

Types of changes

What types of changes does your code introduce?

• Bugfix (a non-breaking change that fixes an issue)
• New feature (a non-breaking change that adds functionality)
• Breaking change (a change that causes existing functionality not to work as expected)
• Optimization
• Refactoring
• Documentation update
• Build-related changes
• Other: Description

Testing

Requires testing

• Yes
• No

If yes, link the PR to the docs update or the issue with the details labeled docs. Remove if not applicable.

Requires explanation in Release Notes

• Yes
• No

[LukaszRozmej]

Stopwatch.ElapsedMilliseconds was long but Stopwatch.GetElapsedTime(startTime).TotalMillisecond is double so I expect the formatting in strings/logs will be suboptimal, can you check?

[ssonthal]

Yes, you are correct. I missed that. Have updated the changes accordingly. Pls check now.